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CVE-2026-27100

medium CVSS 4.3 EPSS 0.3%

Jenkins 2.550 and earlier, LTS 2.541.1 and earlier accepts Run Parameter values that refer to builds the user submitting the build does not have access to, allowing attackers with Item/Build and Item/Configure permission to obtain information about the existence of jobs, the existence of builds, and if a specified build exists, its display name.

Versions it affects

Software versions checked with the free lookup that CVE-2026-27100 applies to, and the release that fixes it where the sources name one.

Jenkins 1.509 fixed in 2.541.2

At a glance

Severity
Medium
CVSS base score
4.3 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.3% probability of exploitation in the next 30 days, higher than 26% of scored vulnerabilities
Weakness
CWE-200
Published
2026-02-18
NVD CVE.org

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